Annotations: 7URX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth C]	V-set_6	e7urxC1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_6	ECOD (1.6)
A [auth C]	I-set_5	e7urxC2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_5	ECOD (1.6)
B [auth L]	C1-set_4	e7urxL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
B [auth L]	V-set	e7urxL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
C [auth H]	V-set_8	e7urxH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
C [auth H]	C1-set_1	e7urxH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV6	Kappa	b-lymphocyte antigen cd19	SAbDab (2025-09-26)
C [auth H]	Heavy Chain	IGHV1	-	b-lymphocyte antigen cd19	SAbDab (2025-09-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C]	B-lymphocyte antigen CD19	-	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity response to stimulus immune response immune system process B cell mediated immunity leukocyte mediated immunity immunoglobulin mediated immune response adaptive immune response immune effector process cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process signaling adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity response to stimulus immune response immune system process B cell mediated immunity leukocyte mediated immunity immunoglobulin mediated immune response adaptive immune response immune effector process cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process signaling positive regulation of biological process cell communication positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process regulation of biological process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway B cell receptor signaling pathway biological regulation regulation of response to stimulus regulation of immune response cellular process antigen receptor-mediated signaling pathway activation of immune response developmental process multicellular organismal process cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation mature B cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B-1 B cell differentiation B cell differentiation cell differentiation anatomical structure development leukocyte differentiation regulation of calcium ion transport regulation of localization positive regulation of cation transmembrane transport positive regulation of calcium ion transport intracellular calcium ion homeostasis negative regulation of biological process calcium ion transport localization positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport maintenance of location transmembrane transport release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis cellular localization inorganic ion homeostasis transport homeostatic process monoatomic ion transmembrane transport calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion metal ion transport maintenance of location in cell regulation of calcium ion transmembrane transport monoatomic cation transmembrane transport intracellular monoatomic cation homeostasis monoatomic ion homeostasis negative regulation of cellular process positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport monoatomic ion transport intracellular chemical homeostasis positive regulation of release of sequestered calcium ion into cytosol regulation of metal ion transport regulation of sequestering of calcium ion positive regulation of cellular process calcium ion transmembrane import into cytosol regulation of transport sequestering of calcium ion cellular homeostasis positive regulation of transport regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport B cell proliferation involved in immune response cell population proliferation B cell proliferation B cell activation involved in immune response cell activation involved in immune response leukocyte proliferation mononuclear cell proliferation leukocyte activation involved in immune response lymphocyte proliferation lymphocyte activation involved in immune response regulation of leukocyte activation regulation of cell activation regulation of B cell activation regulation of multicellular organismal process regulation of lymphocyte activation positive regulation of cell communication regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of signal transduction regulation of signal transduction intracellular signal transduction regulation of intracellular signal transduction intracellular signaling cassette regulation of signaling positive regulation of intracellular signal transduction positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction regulation of cell communication phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of signaling regulation of B cell receptor signaling pathway regulation of antigen receptor-mediated signaling pathway	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle membrane microdomain membrane raft protein-containing complex
B [auth L]	SJ25C1 Fab light chain	-	-	-
C [auth H]	SJ25C1 Fab heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C]	IPR042341	B-lymphocyte antigen CD19	Family
A [auth C]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth C]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth C]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth C]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth C]	Pharos: P15391	agammaglobulinemia common variable immunodeficiency immunodeficiency, common variable, 3 lymphatic system disease neuromyelitis optica Pre B-cell acute lymphoblastic leukemia tuberculosis anemia B cell deficiency bone marrow disease diffuse large B-cell lymphoma immunodeficiency, common variable, 2 interstitial cystitis osteosarcoma Sjogren syndrome agammaglobulinemia common variable immunodeficiency immunodeficiency, common variable, 3 lymphatic system disease neuromyelitis optica Pre B-cell acute lymphoblastic leukemia tuberculosis anemia B cell deficiency bone marrow disease diffuse large B-cell lymphoma immunodeficiency, common variable, 2 interstitial cystitis osteosarcoma Sjogren syndrome ulcerative colitis arthritic joint disease B-cell neoplasm cancer leukopenia nasopharyngeal carcinoma periodontitis skin disease autoimmune disease bipolar disorder

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.